My dad passed away two and a half years ago. There was a huge list of great grandchildren so we chose to say that my dad was a dearly loved father, grandfather and great grandfather. The only names we put on were my brother, my sister and her 4 children and partners and me, my hubby and my eldest son and his wife and my youngest son and his partner.
We did the same when my mother in law diesd, I'd have been offended to have been left off the list of names.